Siemens RVA47.320 - Plant Type 67: BMU DHW, H1 Control

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Application examples 15.07.2002
8.13 Plant types RVA47.320 - no. 67
The plant type no. is identical with the number displayed on line 53.
Control of a single BMU or cascade control of up to four BMUs. D.h.w. heating by one
BMU, with changeover valve.
Control of the pump heating circuit by the RVA47.320 based on the heat demand signal
received via input H1.
4
1
2
3
B10
2379S36
B70
T
yp
e of unit BMU 1 BMU 2 BMU 3 BMU 4
RVA47.320
Dis
p
la
y
of
p
lant t
yp
e
67
Heatin
g
curve
(
line 17
)
---
(
inactive
)
or 2.5...40
Pum
p
function Q1
(
line 95
)
5
(p
um
p
H1
)
Other LPB capable controllers on the consumer side signal the RVA47.320 their current
heat demand directly via LPB.
The heat demand signal for the pump heating circuit is generated via input H1.
In addition, the controller itself can generate a weather-compensated flow temperature
(setting the heating curve to a valid value).
When there is only a heat demand signal from the d.h.w. storage tank (heating circuits
do not currently call for heat), the boiler put into operation is only that to which the
storage tank is hydraulically connected. The other boilers of the cascade will not be
released.
L
N
Q1 F1
N1
Q3
B3
B9
B70
B70
M
L
N
2379A 33
MB
LPB
MD
A6 / BMU
PPS
DB
B10
BM
H1
B10
BM
B9
BM
A6
BM
H1
The d.h.w. sensor (B3) is connected directly to BMU 1.
For a detailed legend, refer to page 158.
 Note
Hydraulic circuit
 Important
 Notes
Electrical connections
 Note
Legend